The digital terrain modelling is a crucial issue in visualization of the forestry and urban areas. Among the digital evaluation, surface, and terrain models, the last ones play the significant role in the GIS applications. The challenges of a terrain modelling lead to the development of complex artificial and statistical methods that include a densification of the LiDAR point cloud, a filtering for extraction of the ground and non-ground points, and an interpolation for generation of the bare Earth’s surface. The wide spectrum of methods from each category permit to chose the acceptable solution in practice. However, such conventional way is more available for “heavy weighted”software tools, representing in Chap. 3. The future investigations deal with the design of “light weighted” software tools for unmanned aerial and ground vehicles with a reasonable relation between the accuracy estimators of the models and their computational cost.